The
IPC display, the 20-character, vacuum florescent screen above the steering
column that says "Corvette by Chevrolet" every time you
turn
on the key, is a powerful device. DIY Service Techs are going to be most
interested in the IPC's ability to show diagnostic trouble
codes
(DTC) for all the modules that transmit them. Page numbers referenced
below are in the GM service manual.
The "diagnostic display" mode is entered with the following procedure: Page 8-500
1) turn on the ignition
but don't start the engine.
2) press the "reset"
button to turn off any warning messages
3) press and hold
"options" and
4) while holding
"options", press "fuel" four times within a 10-second period.
Initially,
the on-board diagnostics go into the "automatic" mode which shows each
module's DTC's in a pre-set sequence: To exit the
diagnostic
mode at any time, press "E/M". If you want to erase or "clear" codes, press
"reset."
10 PCM Powertrain
Control Module page 6-357 - 6-361
28 TCS Traction Control
system ABS on page 5-86
?? RTD Real Time
damping page 3-136 (I do not have this option)
40 BCM Body Control
Module page 8-405 UTD Page 8-727
60 IPC Instrument
Panel Cluster page 8-508
80 radio page 8-213
99 HVAC Heater Vent-Air
Conditioning page 1-118
A0 LDCM Left Door
Control module page 8-904 to 8-951
A1 RDCM Right Door
Control Module page 8-904 to 8-951
AC SCM Seat Control
module page 8-1064 -8-1082
B0 RFA Remote Function
Actuation page 8-676
For each module, all DTC's will be displayed. If none are present in a module, you will see "no more codes" on the ICP display.
There
are two kinds of DTC's, "Current" and "History," designated with a letter
suffix, "C" or "H". A current code indicates that the
malfunction
is present in the system whose module is displaying data. A history code
indicates a problem existed in that module
sometime
in the last 40 or 50 ignition cycles. When not accompanied by a current
code of the same number, it is possible it's evidence of
a
previous problem, now solved, that was not removed by clearing codes. More
likely is that a history code indicates an intermittent
malfunction.
"Intermittent"
codes are the most challenging DTCs. An intermittent may have happened
only once, may have happened more than once
but
is inconsistent in its appearance or may be happening on a regular basis
but not at the time the IPC is displaying codes. History codes
can
also be caused by a current malfunction in a system that is not Operating
at the time DTCs are displayed. An example is the rear
window
defogger, which doesn't operate until the BCM detects engine rpm. For history
codes set by a system that does not operate with
the
key on and engine off, a special diagnostic tool called a "scan tester
is necessary to properly diagnose the malfunction.
Once
the IPC has displayed all 11 modules, the system goes into the manual mode
which allows selection of each module using
combinations
of DIC buttons. The manual mode can also be entered at any time during
the automatic sequence by pressing any button
except
"E/M". Once the IPC displays "manual diagnostics," you may select a particular
module by pressing the "options" button to go
forward
or the "trip" button to go back. Once a system is selected and a DTC is
displayed, if more than one are present; press "gages" to
move
forward or "fuel" to go back.
To
exit the diagnostic mode at any time, press "E/M". If you want to erase
or "clear" codes, press "reset." Clearing a code does not repair
a
problem. You are simply erasing the evidence of it in the module's memory.
IPC Display Functions & Codes
10 PCM Powertrain Control Module page 6-357 - 6-361 Domestic
A=DTC set immediately and
MIL is turned on
B=MIL turned on after 2
consecutive drive trips
C=After one failure and
stored in History MIL not turned on
P0101 Mass Air Flow (MAF)
System performance -B
P0102 Mass Air Flow (MAF)
Sensor Circuit Low Frequency -A
P0103 Mass Air Flow (MAF)
Sensor Circuit High Frequency -A
P0107 manifold Absolute
Pressure (MAP) Sensor Circuit Low Voltage -A
P0108 manifold Absolute
Pressure (MAP) Sensor Circuit High Voltage -A
P0112 Intake Air temperature
(IAT) Sensor Circuit Low Voltage -B
P0113 Intake Air temperature
(IAT) Sensor Circuit High Voltage -B
P0117 Engine Coolant Temperature
(ECT) Sensor Low Voltage -A
P0118 Engine Coolant Temperature
(ECT) Sensor High Voltage -A
P0118 Engine Coolant Temperature
(ECT) Excessive Time to Closed Loop Fuel Control -B
P0131 Heated Oxygen Sensor
(HO2S) Circuit Low Voltage Bank 1 Sensor 1 -A
P0132 Heated Oxygen Sensor
(HO2S) Circuit High Voltage Bank 1 Sensor 1 -A
P0133 Heated Oxygen Sensor
(HO2S) Slow Response Bank 1 Sensor 1 -B
P0134 Heated Oxygen Sensor
(HO2S) Circuit Insufficient Activity Bank 1 Sensor 1 -A
P0135 Heated Oxygen Sensor
(HO2S) Heater Circuit Bank 1 Sensor 1 -B
P0137 Heated Oxygen Sensor
(HO2S) Circuit Low Voltage Bank 1 Sensor 2 -B
P0138 Heated Oxygen Sensor
(HO2S) Circuit High Voltage Bank 1 Sensor 2 -B
P0140 Heated Oxygen Sensor
(HO2S) Circuit Insufficient Activity Bank 1 Sensor 2 -B
P0141 Heated Oxygen Sensor
(HO2S) Heater Circuit Bank 1 Sensor 2 -B
P0151 Heated Oxygen Sensor
(HO2S) Circuit Low Voltage Bank 2 Sensor 1 -A
P0152 Heated Oxygen Sensor
(HO2S) Circuit High Voltage Bank 2 Sensor 1 -A
P0153 Heated Oxygen Sensor
(HO2S) Slow Response Bank 2 Sensor 1 -A
P0154 Heated Oxygen Sensor
(HO2S) Circuit Insufficient Activity Bank 2 Sensor 1 -A
P0155 Heated Oxygen Sensor
(HO2S) Heater Circuit Bank 2 Sensor 1 -B
P0157 Heated Oxygen Sensor
(HO2S) Circuit Low Voltage Bank 2 Sensor 2 -B
P0158 Heated Oxygen Sensor
(HO2S) Circuit High Voltage Bank 2 Sensor 2 -B
P0160 Heated Oxygen Sensor
(HO2S) Circuit Insufficient Activity Bank 2 Sensor 2 -B
P0161 Heated Oxygen Sensor
(HO2S) Heater Circuit Bank 2 Sensor 2 -B
P0171 Fuel Trim System Lean
bank 1 -B
P0172 Fuel Trim System Rich
bank 1 -B
P0174 Fuel Trim System Lean
bank 2 -B
P0175 Fuel Trim System Rich
bank 2 -B
P0230 Fuel Pump Control
Circuit -A
P0300 Engine Misfire detected-
B
P0325 Knock Sensor (KS)
System -B
P0327 Knock Sensor (KS)
Circuit Front -B
P0332 Knock Sensor (KS)
Circuit Rear -B
P0335 CKP Sensor Circuit
-A
P0336 CKP Sensor Circuit
Performance -A
P0341 CMP Circuit Performance
-B
P0342 CMP Sensor Circuit
Low Voltage -B
P0343 CMP Sensor Circuit
High Voltage -B
P0351 Ignition Control #1
Circuit -A
P0352 Ignition Control #2
Circuit -A
P0353 Ignition Control #3
Circuit -A
P0354 Ignition Control #4
Circuit -A
P0355 Ignition Control #5
Circuit -A
P0356 Ignition Control #6
Circuit -A
P0357 Ignition Control #7
Circuit -A
P0358 Ignition Control #8
Circuit -A
P0410 AIR System -B
P0412 AIR Solenoid relay
Control Circuit -B
P0418 AIR Pump Relay Control
Circuit -B
P0420 TWC System Low Efficiency
Bank 1 -A
P0430 TWC System Low Efficiency
Bank 2 -A
P0441 EVAP System No Flow
During Purge -B
P0461 Fuel Level Sensor
1 Circuit Performance -C
P0462 Fuel Level Sensor
1 Circuit Low Voltage -C
P0463 Fuel Level Sensor
1 Circuit High Voltage -C
P0480 FC Relay 1 Control
Circuit -B
P0481 FC Relay 2 and 3 Control
Circuit -B
P0500 VSS Circuit (M/T)
-B
P0506 Idle Speed Low -B
P0507 Idle Speed High -B
P0522 Engine Oil Pressure
Sensor Circuit Low Voltage (w/message) -C
P0523 Engine Oil Pressure
Sensor Circuit High Voltage (w/message) -C
P0530 A/C Refrigerant Pressure
Sensor Circuit - C
P0562 System Voltage Low
-C
P0563 System Voltage High
-C
P0567 Cruise Resume Circuit
-C
P0568 Cruise Set Circuit
-C
P0571 Cruise Brake Switch
Circuit (M/T) -C
P0601 PCM Memory -A
P0602 PCM Not Programmed
-A
P0604 PCM RAM Performance
-A
P0606 PCM Internal Communication
Interrupted -A
P0608 VSS Output Circuit
-C
P0650 MIL Control Circuit
-B (No Mil)
P0654 Engine Speed Output
Circuit -C
P0704 Clutch Switch Circuit(M/T)
-B
P0705 Transmission range
Switch Circuit (A/T) -C
P0706 Transmission Range
Switch Performance (A/T) -C
P0801 Reverse Inhibit Solenoid
Control Circuit (M/T) -C
P0803 1-4 Upshift Solenoid
Control Circuit (M/T) -B
P0804 1-4 Upshift lamp Control
Circuit (M/T) -C
P1111 Intake Air temperature
(IAT) Sensor Circuit Intermittent High Voltage -C
P1112 Intake Air temperature
(IAT) Sensor Circuit Intermittent Low Voltage -C
P1114 ECT Sensor Circuit
Intermittent Low Voltage -C
P1115 ECT Sensor Circuit
Intermittent High Voltage -C
P1120 TP sensor 1 Circuit
-A
P1125 APP System -A
P1133 Heated Oxygen Sensor
(HO2S) Insufficient Switching Bank 1 Sensor 1 -B
P1134 Heated Oxygen Sensor
(HO2S) Transition Time ratio Bank 1 Sensor 1 -B
P1153 Heated Oxygen Sensor
(HO2S) Insufficient Switching Bank 2 Sensor 1 -B
P1154 Heated Oxygen Sensor
(HO2S) Transition Time ratio Bank 2 Sensor 1 -B
P1220 TP sensor 2 Circuit
-A
P1221 TP Sensors 1,2 Performance
-A
P1258 Engine Coolant Over
Temperature-Fuel disabled -A
P1275 APP sensor 1 Circuit
-C
P1276 APP Sensor 1 Circuit
Performance -C
P1280 APP sensor 2 Circuit
-C
P1281 APP Sensor 2 Circuit
Performance -C
P1285 APP sensor 3 Circuit
-C
P1286 APP Sensor 3 Circuit
Performance -C
P1380 EB(T)CM DTC Detected-
rough road data Unusable -C
P1381 Misfire Detected -
No EB(T)CM/PCM Serial data -V
P1415 AIR System bank 1
-B
P1416 AIR System bank 2
-B
P1431 Fuel Level Sensor
2 Circuit Performance -C
P1432 Fuel Level Sensor
2 Low Voltage -C
P1433 Fuel Level Sensor
2 High Voltage -C
P1441 Evaporative Emissions
(EVAP) System Flow During Non-Purge -B
P1514 TAC System MAF Performance
-A
P1515 Command vs Actual
Throttle Position performance (PCM Module) -A
P1516 Command vs Actual
Throttle Position performance (TAC Module) -A
P1517 TAC Module Processor
-A
P1518 PCM to TAC Module
Serial Data Circuit -A
P1539 A/C Clutch Status
Circuit High Voltage -C
P1545 A/C Clutch Relay Control
Circuit -C
P1546 A/C Clutch Status
Circuit Low Voltage -C
P1571 ASR Desired Torque
-C
P1574 Stop lamp Control
Circuit -C
P1575 Extended Travel Brake
Switch Circuit High Voltage -C
P1626 Theft Deterrent System
Fuel enable Circuit -C
P1630 Theft Deterrent System
PCM in Learn Mode -C
P1631 Theft Deterrent System
password Incorrect -C
P1635 5 volt Reference #1
Circuit -B
P1639 5 volt Reference #2
Circuit -B
P1644 Delivered Torque Output
Circuit -C
P1652 Powertrain Induced
Chassis Pitch Output Circuit -C
28 TCS Traction Control system ABS on page 5-86
C1214 Sol Valve relay Contact
or coil CKT Open
C1217 BPMV Pump Motor Relay
Contact CKT Open
C1221 LF Wheel Speed Sensor
Input Signal is 0
C1222 RF Wheel Speed Sensor
Input Signal is 0
C1223 LR Wheel Speed Sensor
Input Signal is 0
C1224 RR Wheel Speed Sensor
Input Signal is 0
C1225 RF Excessive Wheel
Speed Variation
C1226 LF Excessive Wheel
Speed Variation
C1227 LR Excessive Wheel
Speed Variation
C1228 RR Excessive Wheel
Speed Variation
C1232 LF Wheel Speed Circuit
Open or Shorted
C1233 RF Wheel Speed Circuit
Open or Shorted
C1234 LR Wheel Speed Circuit
Open or Shorted
C1235 RR Wheel Speed Circuit
Open or Shorted
C1236 Low System Supply
Voltage
C1237 High System Supply
Voltage
C1241 Magna Steer Circuit
Malfunction Refer to variable effort steering on Steering
C1242 BPMV Pump Motor Ground
Circuit Open
C1243 BPMV Pump Motor Stalled
C1255 EBTCM Internal malfunction
CEBCM Internal Malfunction
C1261 LF Inlet Valve Solenoid
Malfunction
C1262 LF Outlet Valve Solenoid
Malfunction
C1263 RF Inlet Valve Solenoid
Malfunction
C1264 RF Outlet Valve Solenoid
Malfunction
C1265 LR Inlet Valve Solenoid
Malfunction
C1266 LR Outlet Valve Solenoid
Malfunction
C1267 RR Inlet Valve Solenoid
Malfunction
C1268 RR Outlet Valve Solenoid
Malfunction
C1273 RF TCS Master Cyl
Isolation Valve malfunction
C1274 RF TCS Prime Valve
malfunction
C1276 Delivered Torque Signal
CKT malfunction
C1277 Requested Torque Signal
CKT Malfunction
C1278 TCS Temporarily Inhibited
by PCM
C1281 Steering Sensor Uncorrelated
Malfunction
C1286 Steering Sensor Bias
Malfunction
C1287 Steering sensor rate
malfunction
C1291 Open brake lamp Sw
Contacts During Deccel
C1293 DTC C1291/C1292 Set
Curnt/Prev Ign Cylce
C1294 Brake Lamp Switch
Circuit Always Active
C1295 Brake Lamp Switch
Circuit Open
U1016 Loss of Communications
with PCM
U1255 Generic Loss Communications
U1300 Class 2 Circuit Shorted
to ground Refer to Data Link Connector System Check in Wiring Systems
U1301 Class 2 Circuit Shorted
to battery Refer to Data Link Connector System Check in Wiring Systems
RTD Real Time damping page 3-136
C1650 ESC Module Malfunction
C1658 EEPROM calibration
Malfunction
C1710 LF Shock Absorber
Solenoid (Short to Voltage)
C1711 LF Shock Absorber
Solenoid (Short to GND)
C1712 LF Shock Absorber
Solenoid (Open Circuit)
C1715 RF Shock Absorber
Solenoid (Short to Voltage)
C1716 RF Shock Absorber
Solenoid (Short to GND)
C1717 RF Shock Absorber
Solenoid (Open Circuit)
C1720 LR Shock Absorber
Solenoid (Short to Voltage)
C1721 LR Shock Absorber
Solenoid (Short to GND)
C1722 LR Shock Absorber
Solenoid (Open Circuit)
C1725 RR Shock Absorber
Solenoid (Short to Voltage)
C1726 RR Shock Absorber
Solenoid (Short to GND)
C1727 RR Shock Absorber
Solenoid (Open Circuit)
C1743 Loss Of Vehicle Speed
Signal
C1760 LF Position Sensor
(Out of range)
C1761 RF Position Sensor
(Out of range)
C1762 LR Position Sensor
(Out of range)
C1763 RR Position Sensor
(Out of range)
C1768 Position Sensor Supply
malfunction (Overcurrent)
C1780 Loss of Steering Position
Signal
C1786 RTD Control Relay
Malfunction
C1787 RTD Control Relay
Circuit (Open or Short to GND)
C1788 RTD Control relay
Circuit (Short to Voltage)
C1790 Ride control switch
(out of range)
C1791 Ride control switch
(contact malfunction
40 BCM Body Control Module page 8-405 UTD Page 8-727
B0432 Rear Defogger Relay
Circuit
B0433 Rear Defogger Relay
Circuit
B0502 RH DRL Relay Circuit
B0503 RH DRL Relay Circuit
B0507 LH DRL Relay Circuit
B0508 LH DRL Relay Circuit
B0605 BCM Internal Memory
Function
B0844 BCM Temporarily Inhibit
ABS
B2403 Front Fog lamp Switch
Circuit
B2408 Rear Fog Lamp Switch
Circuit
B2482 Backup Lamp Relay
Circuit
B2483 Backup Lamp Relay
Circuit
B2527 Horn Relay Circuit
B2528 Horn Relay Circuit
B2573 Hatch Release Switch
Circuit (Short to Voltage)
B2578 RF Turn Signal Monitor
Circuit (Short to Voltage)
B2583 LF Turn Signal Monitor
Circuit (Short to Voltage)
B2587 Column Lock/Unlock
Drive (A)
B2588 Column Lock/Unlock
Drive (A)
B2592 Column Lock/Unlock
Drive (B)
B2583 Column Lock/Unlock
Drive (B)
B2597 Traction Control System
Switch Circuit
B2721 PASS-Key Detection
Circuit
B2722 PASS-Key Detection
Circuit
B2723 PASS-Key Detection
Circuit
B2735 PASS-Key Programming
Mode Active
U1016 Loss of Communications
with PCM
U1096 Loss of Communications
with IPC
U1255 Serial Data Line malfunction
60 IPC Instrument Panel Cluster page 8-508
B0516 Speedometer Signal
Circuit Malfunction
B0521 Tachometer Signal
Circuit Malfunction
B1512 DIC Switch 1 Signal
Short to GND "FUEL"
B1517 DIC Switch 2 Signal
Short to GND "GAGES"
B1522 DIC Switch 3 Signal
Short to GND "TRIP"
B1527 DIC Switch 4 Signal
Short to GND "OPTIONS"
B1532 DIC Switch 5 Signal
Short to GND "E/M"
B1537 DIC Switch 6 Signal
Short to GND "RESET"
B1542 Oil Temperature Circuit
Short to GND
B1543 Oil Temperature Circuit
Open
U1016 Loss of Communications
with PCM
U1040 Loss of Communications
with TCS
U1056 Loss of Communications
with RTD
U1064 Loss of Communications
with BCM
U1128 Loss of Communications
with radio
U1153 Loss of Communications
with HVAC
U1160 Loss of Communications
with LDCM
U1161 Loss of Communications
with RDCM
U1166 Loss of Communications
with SCM
U1176 Loss of Communications
with RFA
U1255 Serial Data Line malfunction
80 radio none found page 8-213
99 HVAC Heater Vent-Air Conditioning page 1-118
B0332 Outside Air Temp sensor
Short to GND
B0333 Outside Air temp sensor
open
B0337 Inside Air temp Sensor
Short to GND
B0338 Inside Air temp sensor
open
B0348 Sunload temperature
sensor open
B0361 Left Actuator Feedback
short to GND
B0363 Left Actuator Feedback
Open
B0365 Right Actuator Feedback
short to GND
B0367 Right Actuator Feedback
Open
B0441 Left Actuator Out
of Range
B0446 Right Actuator Out
of Range
B1016 Loss of Communications
with PCM (No State of Health Message)
U1064 Loss of Communications
with BCM (No State of Health Message)
U1096 Loss of Communications
with IPC (No State of Health Message)
U1255 Serial Data Line malfunction
A0 LDCM Left Door Control module page 8-904 to 8-951
B2202 Left Window Up Switch
Fault DCM-LEFT
B2204 Left Window Down Switch
Fault DCM-LEFT
B2206 Right Window Up Switch
Fault DCM LEFT
B2208 Right Window Down
Switch Fault DCM-L
B2222 LT Mirror Select Switch
Fault DCM-LEFT
B2224 RT Mirror Select Switch
Fault DCM-LEFT
B2226 Mirror Right Switch
Fault DCM-LEFT
B2228 Mirror Left Switch
Fault DCM-LEFT
B2232 Mirror Up Switch Fault
DCM-LEFT
B2234 Mirror Down Switch
Fault DCM-LEFT
B2236 Left Door Lock Switch
Fault DCM-LEFT
B2238 Left Door UnLock Switch
Fault DCM-LEFT
B2242 Memory 1 Switch Fault
DCM-LEFT
B2244 Memory 2 Switch Fault
DCM-LEFT
B2252 Key Cylinder Switch
Fault DCM-LEFT
B2262 Horizontal Position
Sensor Fit DCM-L
B2264 Vertical Position
Sensor Fault DCM-L
B2272 Left Mirror Motor
Fault DCM-L
B2274 Window Motor Fault
DCM-LEFT
B2276 Door Lock Motor/Mirror
Heater Fit DCM-L
B2282 Battery #1 Fault DCM-LEFT
B2284 Battery #2 Fault DCM-LEFT
B2286 +5v Reference Fault
DCM-LEFT
A1 RDCM Right Door Control Module page 8-904 to 8-951
B2203 Right Window Up Switch
Fault DCM RIGHT
B2205 Right Window Down
Switch Fault DCM-R
B2237 Right Door Lock Switch
Fault DCM-RIGHT
B2239 Right Door Un-Lock
Switch Fault DCM-RIGHT
B2253 Key Cylinder Switch
Fault DCM-RIGHT
B2263 Horizontal Position
Sensor Fit DCM-R
B2265 Horizontal Position
Sensor Fault DCM-R
B2273 Right Mirror Motor
Fault DCM-Right
B2275 Window Motor Fault
DCM-Right
B2277 Door Lock Motor/Mirror
Heater Fit DCM-R
B2283 Battery #1 Fault DCM-RIGHT
B2285 Battery #2 Fault DCM-RIGHT
B2287 +5v Reference Fault
DCM-RIGHT
AC SCM Seat Control module page 8-1064 -8-1082
B0846 Battery 2 out of range
B0851 Battery 1 out of range
B0856 +5 Volt Reference
Out Of Range
B2002 Fore/Aft Seat motor
Open or Short to GND
B2007 Front Vert. Seat motor
Open or Shorted
B2012 Rear Vert. Seat motor
Open or Shorted
B2172 Seat Front Up Switch
Shorted to GND
B2177 Seat Front Down Switch
Shorted to GND
B2182 Seat Rear Up Switch
Shorted to GND
B2187 Seat Rear Down Switch
Shorted to GND
B2192 Seat Forward Switch
Shorted to GND
B2197 Seat Reverse Switch
Shorted to GND
B2600 Seat Motor to Battery
Voltage
B2605 Seat Front Vert. Position
Sensor Failure
B2606 Seat Rear Vert. Position
Sensor Failure
B2607 Seat Horizontal Position
Sensor Failure
B0 RFA Remote Function Actuation page 8-676
B0605 Receiver Internal memory
malfunction -RFA
B2805 No Transmitters Programmed
-RFA
C2100 Left Front TPM Sensor
Malfunction -TPM
C2105 Right Front TPM Sensor
Malfunction -TPM
C2110 Right Rear TPM Sensor
Malfunction -TPM
C2115 Left Rear TPM Sensor
Malfunction -TPM
C2120 TPM System malfunction
(No Sensors Received -TPM
C2121 TPM System Programming
malfunction (No Sensors Programmed) -TPM
U1000 Loss of Communication
Undetermined -RFA
U1016 Loss Of Communication
with PCM (No SOH Message Received -RFA
U1064 Loss Of Communication
with BCM (No SOH Message Received -RFA
U1096 Loss Of Communication
with IPC (No SOH Message Received -RFA
U1255 Serial Data Line Malfunction
-RFA
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